How to create my own namservers

[tejasrana95]

Hi to all experts,
Recently i installed sentora 1.0 on ubuntu 14.04 using dot.tk domain name.
the main domain is : tnfhost.tk
panel : panel.tnfhost.tk

now i want to create my own nameservers:
ns1.tnfhost.tk
ns2.tnfhost.tk

so i can add other domain easily with entering A record on domain providers i want use only nameservers.

Please help me to create my own namservers as well as how to register that nameserver in my Ubuntu server.